io/channel-tls.c: make qio_channel_tls_shutdown thread-safe
[qemu/ar7.git] / qemu-io-cmds.c
blob97611969cbbb955eff5f8a02cf0911b251b1e347
1 /*
2 * Command line utility to exercise the QEMU I/O path.
4 * Copyright (C) 2009-2016 Red Hat, Inc.
5 * Copyright (c) 2003-2005 Silicon Graphics, Inc.
7 * This work is licensed under the terms of the GNU GPL, version 2 or later.
8 * See the COPYING file in the top-level directory.
9 */
11 #include "qemu/osdep.h"
12 #include "qapi/error.h"
13 #include "qapi/qmp/qdict.h"
14 #include "qemu-io.h"
15 #include "sysemu/block-backend.h"
16 #include "block/block.h"
17 #include "block/block_int.h" /* for info_f() */
18 #include "block/qapi.h"
19 #include "qemu/error-report.h"
20 #include "qemu/main-loop.h"
21 #include "qemu/option.h"
22 #include "qemu/timer.h"
23 #include "qemu/cutils.h"
25 #define CMD_NOFILE_OK 0x01
27 bool qemuio_misalign;
29 static cmdinfo_t *cmdtab;
30 static int ncmds;
32 static int compare_cmdname(const void *a, const void *b)
34 return strcmp(((const cmdinfo_t *)a)->name,
35 ((const cmdinfo_t *)b)->name);
38 void qemuio_add_command(const cmdinfo_t *ci)
40 /* ci->perm assumes a file is open, but the GLOBAL and NOFILE_OK
41 * flags allow it not to be, so that combination is invalid.
42 * Catch it now rather than letting it manifest as a crash if a
43 * particular set of command line options are used.
45 assert(ci->perm == 0 ||
46 (ci->flags & (CMD_FLAG_GLOBAL | CMD_NOFILE_OK)) == 0);
47 cmdtab = g_renew(cmdinfo_t, cmdtab, ++ncmds);
48 cmdtab[ncmds - 1] = *ci;
49 qsort(cmdtab, ncmds, sizeof(*cmdtab), compare_cmdname);
52 void qemuio_command_usage(const cmdinfo_t *ci)
54 printf("%s %s -- %s\n", ci->name, ci->args, ci->oneline);
57 static int init_check_command(BlockBackend *blk, const cmdinfo_t *ct)
59 if (ct->flags & CMD_FLAG_GLOBAL) {
60 return 1;
62 if (!(ct->flags & CMD_NOFILE_OK) && !blk) {
63 fprintf(stderr, "no file open, try 'help open'\n");
64 return 0;
66 return 1;
69 static int command(BlockBackend *blk, const cmdinfo_t *ct, int argc,
70 char **argv)
72 char *cmd = argv[0];
74 if (!init_check_command(blk, ct)) {
75 return -EINVAL;
78 if (argc - 1 < ct->argmin || (ct->argmax != -1 && argc - 1 > ct->argmax)) {
79 if (ct->argmax == -1) {
80 fprintf(stderr,
81 "bad argument count %d to %s, expected at least %d arguments\n",
82 argc-1, cmd, ct->argmin);
83 } else if (ct->argmin == ct->argmax) {
84 fprintf(stderr,
85 "bad argument count %d to %s, expected %d arguments\n",
86 argc-1, cmd, ct->argmin);
87 } else {
88 fprintf(stderr,
89 "bad argument count %d to %s, expected between %d and %d arguments\n",
90 argc-1, cmd, ct->argmin, ct->argmax);
92 return -EINVAL;
95 /* Request additional permissions if necessary for this command. The caller
96 * is responsible for restoring the original permissions afterwards if this
97 * is what it wants. */
98 if (ct->perm && blk_is_available(blk)) {
99 uint64_t orig_perm, orig_shared_perm;
100 blk_get_perm(blk, &orig_perm, &orig_shared_perm);
102 if (ct->perm & ~orig_perm) {
103 uint64_t new_perm;
104 Error *local_err = NULL;
105 int ret;
107 new_perm = orig_perm | ct->perm;
109 ret = blk_set_perm(blk, new_perm, orig_shared_perm, &local_err);
110 if (ret < 0) {
111 error_report_err(local_err);
112 return ret;
117 qemu_reset_optind();
118 return ct->cfunc(blk, argc, argv);
121 static const cmdinfo_t *find_command(const char *cmd)
123 cmdinfo_t *ct;
125 for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
126 if (strcmp(ct->name, cmd) == 0 ||
127 (ct->altname && strcmp(ct->altname, cmd) == 0))
129 return (const cmdinfo_t *)ct;
132 return NULL;
135 /* Invoke fn() for commands with a matching prefix */
136 void qemuio_complete_command(const char *input,
137 void (*fn)(const char *cmd, void *opaque),
138 void *opaque)
140 cmdinfo_t *ct;
141 size_t input_len = strlen(input);
143 for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
144 if (strncmp(input, ct->name, input_len) == 0) {
145 fn(ct->name, opaque);
150 static char **breakline(char *input, int *count)
152 int c = 0;
153 char *p;
154 char **rval = g_new0(char *, 1);
156 while (rval && (p = qemu_strsep(&input, " ")) != NULL) {
157 if (!*p) {
158 continue;
160 c++;
161 rval = g_renew(char *, rval, (c + 1));
162 rval[c - 1] = p;
163 rval[c] = NULL;
165 *count = c;
166 return rval;
169 static int64_t cvtnum(const char *s)
171 int err;
172 uint64_t value;
174 err = qemu_strtosz(s, NULL, &value);
175 if (err < 0) {
176 return err;
178 if (value > INT64_MAX) {
179 return -ERANGE;
181 return value;
184 static void print_cvtnum_err(int64_t rc, const char *arg)
186 switch (rc) {
187 case -EINVAL:
188 printf("Parsing error: non-numeric argument,"
189 " or extraneous/unrecognized suffix -- %s\n", arg);
190 break;
191 case -ERANGE:
192 printf("Parsing error: argument too large -- %s\n", arg);
193 break;
194 default:
195 printf("Parsing error: %s\n", arg);
199 #define EXABYTES(x) ((long long)(x) << 60)
200 #define PETABYTES(x) ((long long)(x) << 50)
201 #define TERABYTES(x) ((long long)(x) << 40)
202 #define GIGABYTES(x) ((long long)(x) << 30)
203 #define MEGABYTES(x) ((long long)(x) << 20)
204 #define KILOBYTES(x) ((long long)(x) << 10)
206 #define TO_EXABYTES(x) ((x) / EXABYTES(1))
207 #define TO_PETABYTES(x) ((x) / PETABYTES(1))
208 #define TO_TERABYTES(x) ((x) / TERABYTES(1))
209 #define TO_GIGABYTES(x) ((x) / GIGABYTES(1))
210 #define TO_MEGABYTES(x) ((x) / MEGABYTES(1))
211 #define TO_KILOBYTES(x) ((x) / KILOBYTES(1))
213 static void cvtstr(double value, char *str, size_t size)
215 char *trim;
216 const char *suffix;
218 if (value >= EXABYTES(1)) {
219 suffix = " EiB";
220 snprintf(str, size - 4, "%.3f", TO_EXABYTES(value));
221 } else if (value >= PETABYTES(1)) {
222 suffix = " PiB";
223 snprintf(str, size - 4, "%.3f", TO_PETABYTES(value));
224 } else if (value >= TERABYTES(1)) {
225 suffix = " TiB";
226 snprintf(str, size - 4, "%.3f", TO_TERABYTES(value));
227 } else if (value >= GIGABYTES(1)) {
228 suffix = " GiB";
229 snprintf(str, size - 4, "%.3f", TO_GIGABYTES(value));
230 } else if (value >= MEGABYTES(1)) {
231 suffix = " MiB";
232 snprintf(str, size - 4, "%.3f", TO_MEGABYTES(value));
233 } else if (value >= KILOBYTES(1)) {
234 suffix = " KiB";
235 snprintf(str, size - 4, "%.3f", TO_KILOBYTES(value));
236 } else {
237 suffix = " bytes";
238 snprintf(str, size - 6, "%f", value);
241 trim = strstr(str, ".000");
242 if (trim) {
243 strcpy(trim, suffix);
244 } else {
245 strcat(str, suffix);
251 static struct timespec tsub(struct timespec t1, struct timespec t2)
253 t1.tv_nsec -= t2.tv_nsec;
254 if (t1.tv_nsec < 0) {
255 t1.tv_nsec += NANOSECONDS_PER_SECOND;
256 t1.tv_sec--;
258 t1.tv_sec -= t2.tv_sec;
259 return t1;
262 static double tdiv(double value, struct timespec tv)
264 double seconds = tv.tv_sec + (tv.tv_nsec / 1e9);
265 return value / seconds;
268 #define HOURS(sec) ((sec) / (60 * 60))
269 #define MINUTES(sec) (((sec) % (60 * 60)) / 60)
270 #define SECONDS(sec) ((sec) % 60)
272 enum {
273 DEFAULT_TIME = 0x0,
274 TERSE_FIXED_TIME = 0x1,
275 VERBOSE_FIXED_TIME = 0x2,
278 static void timestr(struct timespec *tv, char *ts, size_t size, int format)
280 double frac_sec = tv->tv_nsec / 1e9;
282 if (format & TERSE_FIXED_TIME) {
283 if (!HOURS(tv->tv_sec)) {
284 snprintf(ts, size, "%u:%05.2f",
285 (unsigned int) MINUTES(tv->tv_sec),
286 SECONDS(tv->tv_sec) + frac_sec);
287 return;
289 format |= VERBOSE_FIXED_TIME; /* fallback if hours needed */
292 if ((format & VERBOSE_FIXED_TIME) || tv->tv_sec) {
293 snprintf(ts, size, "%u:%02u:%05.2f",
294 (unsigned int) HOURS(tv->tv_sec),
295 (unsigned int) MINUTES(tv->tv_sec),
296 SECONDS(tv->tv_sec) + frac_sec);
297 } else {
298 snprintf(ts, size, "%05.2f sec", frac_sec);
303 * Parse the pattern argument to various sub-commands.
305 * Because the pattern is used as an argument to memset it must evaluate
306 * to an unsigned integer that fits into a single byte.
308 static int parse_pattern(const char *arg)
310 char *endptr = NULL;
311 long pattern;
313 pattern = strtol(arg, &endptr, 0);
314 if (pattern < 0 || pattern > UCHAR_MAX || *endptr != '\0') {
315 printf("%s is not a valid pattern byte\n", arg);
316 return -1;
319 return pattern;
323 * Memory allocation helpers.
325 * Make sure memory is aligned by default, or purposefully misaligned if
326 * that is specified on the command line.
329 #define MISALIGN_OFFSET 16
330 static void *qemu_io_alloc(BlockBackend *blk, size_t len, int pattern)
332 void *buf;
334 if (qemuio_misalign) {
335 len += MISALIGN_OFFSET;
337 buf = blk_blockalign(blk, len);
338 memset(buf, pattern, len);
339 if (qemuio_misalign) {
340 buf += MISALIGN_OFFSET;
342 return buf;
345 static void qemu_io_free(void *p)
347 if (qemuio_misalign) {
348 p -= MISALIGN_OFFSET;
350 qemu_vfree(p);
354 * qemu_io_alloc_from_file()
356 * Allocates the buffer and populates it with the content of the given file
357 * up to @len bytes. If the file length is less than @len, then the buffer
358 * is populated with the file content cyclically.
360 * @blk - the block backend where the buffer content is going to be written to
361 * @len - the buffer length
362 * @file_name - the file to read the content from
364 * Returns: the buffer pointer on success
365 * NULL on error
367 static void *qemu_io_alloc_from_file(BlockBackend *blk, size_t len,
368 const char *file_name)
370 char *buf, *buf_origin;
371 FILE *f = fopen(file_name, "r");
372 int pattern_len;
374 if (!f) {
375 perror(file_name);
376 return NULL;
379 if (qemuio_misalign) {
380 len += MISALIGN_OFFSET;
383 buf_origin = buf = blk_blockalign(blk, len);
385 if (qemuio_misalign) {
386 buf_origin += MISALIGN_OFFSET;
387 buf += MISALIGN_OFFSET;
388 len -= MISALIGN_OFFSET;
391 pattern_len = fread(buf_origin, 1, len, f);
393 if (ferror(f)) {
394 perror(file_name);
395 goto error;
398 if (pattern_len == 0) {
399 fprintf(stderr, "%s: file is empty\n", file_name);
400 goto error;
403 fclose(f);
404 f = NULL;
406 if (len > pattern_len) {
407 len -= pattern_len;
408 buf += pattern_len;
410 while (len > 0) {
411 size_t len_to_copy = MIN(pattern_len, len);
413 memcpy(buf, buf_origin, len_to_copy);
415 len -= len_to_copy;
416 buf += len_to_copy;
420 return buf_origin;
422 error:
423 qemu_io_free(buf_origin);
424 if (f) {
425 fclose(f);
427 return NULL;
430 static void dump_buffer(const void *buffer, int64_t offset, int64_t len)
432 uint64_t i;
433 int j;
434 const uint8_t *p;
436 for (i = 0, p = buffer; i < len; i += 16) {
437 const uint8_t *s = p;
439 printf("%08" PRIx64 ": ", offset + i);
440 for (j = 0; j < 16 && i + j < len; j++, p++) {
441 printf("%02x ", *p);
443 printf(" ");
444 for (j = 0; j < 16 && i + j < len; j++, s++) {
445 if (isalnum(*s)) {
446 printf("%c", *s);
447 } else {
448 printf(".");
451 printf("\n");
455 static void print_report(const char *op, struct timespec *t, int64_t offset,
456 int64_t count, int64_t total, int cnt, bool Cflag)
458 char s1[64], s2[64], ts[64];
460 timestr(t, ts, sizeof(ts), Cflag ? VERBOSE_FIXED_TIME : 0);
461 if (!Cflag) {
462 cvtstr((double)total, s1, sizeof(s1));
463 cvtstr(tdiv((double)total, *t), s2, sizeof(s2));
464 printf("%s %"PRId64"/%"PRId64" bytes at offset %" PRId64 "\n",
465 op, total, count, offset);
466 printf("%s, %d ops; %s (%s/sec and %.4f ops/sec)\n",
467 s1, cnt, ts, s2, tdiv((double)cnt, *t));
468 } else {/* bytes,ops,time,bytes/sec,ops/sec */
469 printf("%"PRId64",%d,%s,%.3f,%.3f\n",
470 total, cnt, ts,
471 tdiv((double)total, *t),
472 tdiv((double)cnt, *t));
477 * Parse multiple length statements for vectored I/O, and construct an I/O
478 * vector matching it.
480 static void *
481 create_iovec(BlockBackend *blk, QEMUIOVector *qiov, char **argv, int nr_iov,
482 int pattern)
484 size_t *sizes = g_new0(size_t, nr_iov);
485 size_t count = 0;
486 void *buf = NULL;
487 void *p;
488 int i;
490 for (i = 0; i < nr_iov; i++) {
491 char *arg = argv[i];
492 int64_t len;
494 len = cvtnum(arg);
495 if (len < 0) {
496 print_cvtnum_err(len, arg);
497 goto fail;
500 if (len > BDRV_REQUEST_MAX_BYTES) {
501 printf("Argument '%s' exceeds maximum size %" PRIu64 "\n", arg,
502 (uint64_t)BDRV_REQUEST_MAX_BYTES);
503 goto fail;
506 if (count > BDRV_REQUEST_MAX_BYTES - len) {
507 printf("The total number of bytes exceed the maximum size %" PRIu64
508 "\n", (uint64_t)BDRV_REQUEST_MAX_BYTES);
509 goto fail;
512 sizes[i] = len;
513 count += len;
516 qemu_iovec_init(qiov, nr_iov);
518 buf = p = qemu_io_alloc(blk, count, pattern);
520 for (i = 0; i < nr_iov; i++) {
521 qemu_iovec_add(qiov, p, sizes[i]);
522 p += sizes[i];
525 fail:
526 g_free(sizes);
527 return buf;
530 static int do_pread(BlockBackend *blk, char *buf, int64_t offset,
531 int64_t bytes, int64_t *total)
533 if (bytes > INT_MAX) {
534 return -ERANGE;
537 *total = blk_pread(blk, offset, (uint8_t *)buf, bytes);
538 if (*total < 0) {
539 return *total;
541 return 1;
544 static int do_pwrite(BlockBackend *blk, char *buf, int64_t offset,
545 int64_t bytes, int flags, int64_t *total)
547 if (bytes > INT_MAX) {
548 return -ERANGE;
551 *total = blk_pwrite(blk, offset, (uint8_t *)buf, bytes, flags);
552 if (*total < 0) {
553 return *total;
555 return 1;
558 typedef struct {
559 BlockBackend *blk;
560 int64_t offset;
561 int64_t bytes;
562 int64_t *total;
563 int flags;
564 int ret;
565 bool done;
566 } CoWriteZeroes;
568 static void coroutine_fn co_pwrite_zeroes_entry(void *opaque)
570 CoWriteZeroes *data = opaque;
572 data->ret = blk_co_pwrite_zeroes(data->blk, data->offset, data->bytes,
573 data->flags);
574 data->done = true;
575 if (data->ret < 0) {
576 *data->total = data->ret;
577 return;
580 *data->total = data->bytes;
583 static int do_co_pwrite_zeroes(BlockBackend *blk, int64_t offset,
584 int64_t bytes, int flags, int64_t *total)
586 Coroutine *co;
587 CoWriteZeroes data = {
588 .blk = blk,
589 .offset = offset,
590 .bytes = bytes,
591 .total = total,
592 .flags = flags,
593 .done = false,
596 if (bytes > INT_MAX) {
597 return -ERANGE;
600 co = qemu_coroutine_create(co_pwrite_zeroes_entry, &data);
601 bdrv_coroutine_enter(blk_bs(blk), co);
602 while (!data.done) {
603 aio_poll(blk_get_aio_context(blk), true);
605 if (data.ret < 0) {
606 return data.ret;
607 } else {
608 return 1;
612 static int do_write_compressed(BlockBackend *blk, char *buf, int64_t offset,
613 int64_t bytes, int64_t *total)
615 int ret;
617 if (bytes > BDRV_REQUEST_MAX_BYTES) {
618 return -ERANGE;
621 ret = blk_pwrite_compressed(blk, offset, buf, bytes);
622 if (ret < 0) {
623 return ret;
625 *total = bytes;
626 return 1;
629 static int do_load_vmstate(BlockBackend *blk, char *buf, int64_t offset,
630 int64_t count, int64_t *total)
632 if (count > INT_MAX) {
633 return -ERANGE;
636 *total = blk_load_vmstate(blk, (uint8_t *)buf, offset, count);
637 if (*total < 0) {
638 return *total;
640 return 1;
643 static int do_save_vmstate(BlockBackend *blk, char *buf, int64_t offset,
644 int64_t count, int64_t *total)
646 if (count > INT_MAX) {
647 return -ERANGE;
650 *total = blk_save_vmstate(blk, (uint8_t *)buf, offset, count);
651 if (*total < 0) {
652 return *total;
654 return 1;
657 #define NOT_DONE 0x7fffffff
658 static void aio_rw_done(void *opaque, int ret)
660 *(int *)opaque = ret;
663 static int do_aio_readv(BlockBackend *blk, QEMUIOVector *qiov,
664 int64_t offset, int *total)
666 int async_ret = NOT_DONE;
668 blk_aio_preadv(blk, offset, qiov, 0, aio_rw_done, &async_ret);
669 while (async_ret == NOT_DONE) {
670 main_loop_wait(false);
673 *total = qiov->size;
674 return async_ret < 0 ? async_ret : 1;
677 static int do_aio_writev(BlockBackend *blk, QEMUIOVector *qiov,
678 int64_t offset, int flags, int *total)
680 int async_ret = NOT_DONE;
682 blk_aio_pwritev(blk, offset, qiov, flags, aio_rw_done, &async_ret);
683 while (async_ret == NOT_DONE) {
684 main_loop_wait(false);
687 *total = qiov->size;
688 return async_ret < 0 ? async_ret : 1;
691 static void read_help(void)
693 printf(
694 "\n"
695 " reads a range of bytes from the given offset\n"
696 "\n"
697 " Example:\n"
698 " 'read -v 512 1k' - dumps 1 kilobyte read from 512 bytes into the file\n"
699 "\n"
700 " Reads a segment of the currently open file, optionally dumping it to the\n"
701 " standard output stream (with -v option) for subsequent inspection.\n"
702 " -b, -- read from the VM state rather than the virtual disk\n"
703 " -C, -- report statistics in a machine parsable format\n"
704 " -l, -- length for pattern verification (only with -P)\n"
705 " -p, -- ignored for backwards compatibility\n"
706 " -P, -- use a pattern to verify read data\n"
707 " -q, -- quiet mode, do not show I/O statistics\n"
708 " -s, -- start offset for pattern verification (only with -P)\n"
709 " -v, -- dump buffer to standard output\n"
710 "\n");
713 static int read_f(BlockBackend *blk, int argc, char **argv);
715 static const cmdinfo_t read_cmd = {
716 .name = "read",
717 .altname = "r",
718 .cfunc = read_f,
719 .argmin = 2,
720 .argmax = -1,
721 .args = "[-abCqv] [-P pattern [-s off] [-l len]] off len",
722 .oneline = "reads a number of bytes at a specified offset",
723 .help = read_help,
726 static int read_f(BlockBackend *blk, int argc, char **argv)
728 struct timespec t1, t2;
729 bool Cflag = false, qflag = false, vflag = false;
730 bool Pflag = false, sflag = false, lflag = false, bflag = false;
731 int c, cnt, ret;
732 char *buf;
733 int64_t offset;
734 int64_t count;
735 /* Some compilers get confused and warn if this is not initialized. */
736 int64_t total = 0;
737 int pattern = 0;
738 int64_t pattern_offset = 0, pattern_count = 0;
740 while ((c = getopt(argc, argv, "bCl:pP:qs:v")) != -1) {
741 switch (c) {
742 case 'b':
743 bflag = true;
744 break;
745 case 'C':
746 Cflag = true;
747 break;
748 case 'l':
749 lflag = true;
750 pattern_count = cvtnum(optarg);
751 if (pattern_count < 0) {
752 print_cvtnum_err(pattern_count, optarg);
753 return pattern_count;
755 break;
756 case 'p':
757 /* Ignored for backwards compatibility */
758 break;
759 case 'P':
760 Pflag = true;
761 pattern = parse_pattern(optarg);
762 if (pattern < 0) {
763 return -EINVAL;
765 break;
766 case 'q':
767 qflag = true;
768 break;
769 case 's':
770 sflag = true;
771 pattern_offset = cvtnum(optarg);
772 if (pattern_offset < 0) {
773 print_cvtnum_err(pattern_offset, optarg);
774 return pattern_offset;
776 break;
777 case 'v':
778 vflag = true;
779 break;
780 default:
781 qemuio_command_usage(&read_cmd);
782 return -EINVAL;
786 if (optind != argc - 2) {
787 qemuio_command_usage(&read_cmd);
788 return -EINVAL;
791 offset = cvtnum(argv[optind]);
792 if (offset < 0) {
793 print_cvtnum_err(offset, argv[optind]);
794 return offset;
797 optind++;
798 count = cvtnum(argv[optind]);
799 if (count < 0) {
800 print_cvtnum_err(count, argv[optind]);
801 return count;
802 } else if (count > BDRV_REQUEST_MAX_BYTES) {
803 printf("length cannot exceed %" PRIu64 ", given %s\n",
804 (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]);
805 return -EINVAL;
808 if (!Pflag && (lflag || sflag)) {
809 qemuio_command_usage(&read_cmd);
810 return -EINVAL;
813 if (!lflag) {
814 pattern_count = count - pattern_offset;
817 if ((pattern_count < 0) || (pattern_count + pattern_offset > count)) {
818 printf("pattern verification range exceeds end of read data\n");
819 return -EINVAL;
822 if (bflag) {
823 if (!QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE)) {
824 printf("%" PRId64 " is not a sector-aligned value for 'offset'\n",
825 offset);
826 return -EINVAL;
828 if (!QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE)) {
829 printf("%"PRId64" is not a sector-aligned value for 'count'\n",
830 count);
831 return -EINVAL;
835 buf = qemu_io_alloc(blk, count, 0xab);
837 clock_gettime(CLOCK_MONOTONIC, &t1);
838 if (bflag) {
839 ret = do_load_vmstate(blk, buf, offset, count, &total);
840 } else {
841 ret = do_pread(blk, buf, offset, count, &total);
843 clock_gettime(CLOCK_MONOTONIC, &t2);
845 if (ret < 0) {
846 printf("read failed: %s\n", strerror(-ret));
847 goto out;
849 cnt = ret;
851 ret = 0;
853 if (Pflag) {
854 void *cmp_buf = g_malloc(pattern_count);
855 memset(cmp_buf, pattern, pattern_count);
856 if (memcmp(buf + pattern_offset, cmp_buf, pattern_count)) {
857 printf("Pattern verification failed at offset %"
858 PRId64 ", %"PRId64" bytes\n",
859 offset + pattern_offset, pattern_count);
860 ret = -EINVAL;
862 g_free(cmp_buf);
865 if (qflag) {
866 goto out;
869 if (vflag) {
870 dump_buffer(buf, offset, count);
873 /* Finally, report back -- -C gives a parsable format */
874 t2 = tsub(t2, t1);
875 print_report("read", &t2, offset, count, total, cnt, Cflag);
877 out:
878 qemu_io_free(buf);
879 return ret;
882 static void readv_help(void)
884 printf(
885 "\n"
886 " reads a range of bytes from the given offset into multiple buffers\n"
887 "\n"
888 " Example:\n"
889 " 'readv -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
890 "\n"
891 " Reads a segment of the currently open file, optionally dumping it to the\n"
892 " standard output stream (with -v option) for subsequent inspection.\n"
893 " Uses multiple iovec buffers if more than one byte range is specified.\n"
894 " -C, -- report statistics in a machine parsable format\n"
895 " -P, -- use a pattern to verify read data\n"
896 " -v, -- dump buffer to standard output\n"
897 " -q, -- quiet mode, do not show I/O statistics\n"
898 "\n");
901 static int readv_f(BlockBackend *blk, int argc, char **argv);
903 static const cmdinfo_t readv_cmd = {
904 .name = "readv",
905 .cfunc = readv_f,
906 .argmin = 2,
907 .argmax = -1,
908 .args = "[-Cqv] [-P pattern] off len [len..]",
909 .oneline = "reads a number of bytes at a specified offset",
910 .help = readv_help,
913 static int readv_f(BlockBackend *blk, int argc, char **argv)
915 struct timespec t1, t2;
916 bool Cflag = false, qflag = false, vflag = false;
917 int c, cnt, ret;
918 char *buf;
919 int64_t offset;
920 /* Some compilers get confused and warn if this is not initialized. */
921 int total = 0;
922 int nr_iov;
923 QEMUIOVector qiov;
924 int pattern = 0;
925 bool Pflag = false;
927 while ((c = getopt(argc, argv, "CP:qv")) != -1) {
928 switch (c) {
929 case 'C':
930 Cflag = true;
931 break;
932 case 'P':
933 Pflag = true;
934 pattern = parse_pattern(optarg);
935 if (pattern < 0) {
936 return -EINVAL;
938 break;
939 case 'q':
940 qflag = true;
941 break;
942 case 'v':
943 vflag = true;
944 break;
945 default:
946 qemuio_command_usage(&readv_cmd);
947 return -EINVAL;
951 if (optind > argc - 2) {
952 qemuio_command_usage(&readv_cmd);
953 return -EINVAL;
957 offset = cvtnum(argv[optind]);
958 if (offset < 0) {
959 print_cvtnum_err(offset, argv[optind]);
960 return offset;
962 optind++;
964 nr_iov = argc - optind;
965 buf = create_iovec(blk, &qiov, &argv[optind], nr_iov, 0xab);
966 if (buf == NULL) {
967 return -EINVAL;
970 clock_gettime(CLOCK_MONOTONIC, &t1);
971 ret = do_aio_readv(blk, &qiov, offset, &total);
972 clock_gettime(CLOCK_MONOTONIC, &t2);
974 if (ret < 0) {
975 printf("readv failed: %s\n", strerror(-ret));
976 goto out;
978 cnt = ret;
980 ret = 0;
982 if (Pflag) {
983 void *cmp_buf = g_malloc(qiov.size);
984 memset(cmp_buf, pattern, qiov.size);
985 if (memcmp(buf, cmp_buf, qiov.size)) {
986 printf("Pattern verification failed at offset %"
987 PRId64 ", %zu bytes\n", offset, qiov.size);
988 ret = -EINVAL;
990 g_free(cmp_buf);
993 if (qflag) {
994 goto out;
997 if (vflag) {
998 dump_buffer(buf, offset, qiov.size);
1001 /* Finally, report back -- -C gives a parsable format */
1002 t2 = tsub(t2, t1);
1003 print_report("read", &t2, offset, qiov.size, total, cnt, Cflag);
1005 out:
1006 qemu_iovec_destroy(&qiov);
1007 qemu_io_free(buf);
1008 return ret;
1011 static void write_help(void)
1013 printf(
1014 "\n"
1015 " writes a range of bytes from the given offset\n"
1016 "\n"
1017 " Example:\n"
1018 " 'write 512 1k' - writes 1 kilobyte at 512 bytes into the open file\n"
1019 "\n"
1020 " Writes into a segment of the currently open file, using a buffer\n"
1021 " filled with a set pattern (0xcdcdcdcd).\n"
1022 " -b, -- write to the VM state rather than the virtual disk\n"
1023 " -c, -- write compressed data with blk_write_compressed\n"
1024 " -f, -- use Force Unit Access semantics\n"
1025 " -n, -- with -z, don't allow slow fallback\n"
1026 " -p, -- ignored for backwards compatibility\n"
1027 " -P, -- use different pattern to fill file\n"
1028 " -s, -- use a pattern file to fill the write buffer\n"
1029 " -C, -- report statistics in a machine parsable format\n"
1030 " -q, -- quiet mode, do not show I/O statistics\n"
1031 " -u, -- with -z, allow unmapping\n"
1032 " -z, -- write zeroes using blk_co_pwrite_zeroes\n"
1033 "\n");
1036 static int write_f(BlockBackend *blk, int argc, char **argv);
1038 static const cmdinfo_t write_cmd = {
1039 .name = "write",
1040 .altname = "w",
1041 .cfunc = write_f,
1042 .perm = BLK_PERM_WRITE,
1043 .argmin = 2,
1044 .argmax = -1,
1045 .args = "[-bcCfnquz] [-P pattern | -s source_file] off len",
1046 .oneline = "writes a number of bytes at a specified offset",
1047 .help = write_help,
1050 static int write_f(BlockBackend *blk, int argc, char **argv)
1052 struct timespec t1, t2;
1053 bool Cflag = false, qflag = false, bflag = false;
1054 bool Pflag = false, zflag = false, cflag = false, sflag = false;
1055 int flags = 0;
1056 int c, cnt, ret;
1057 char *buf = NULL;
1058 int64_t offset;
1059 int64_t count;
1060 /* Some compilers get confused and warn if this is not initialized. */
1061 int64_t total = 0;
1062 int pattern = 0xcd;
1063 const char *file_name = NULL;
1065 while ((c = getopt(argc, argv, "bcCfnpP:qs:uz")) != -1) {
1066 switch (c) {
1067 case 'b':
1068 bflag = true;
1069 break;
1070 case 'c':
1071 cflag = true;
1072 break;
1073 case 'C':
1074 Cflag = true;
1075 break;
1076 case 'f':
1077 flags |= BDRV_REQ_FUA;
1078 break;
1079 case 'n':
1080 flags |= BDRV_REQ_NO_FALLBACK;
1081 break;
1082 case 'p':
1083 /* Ignored for backwards compatibility */
1084 break;
1085 case 'P':
1086 Pflag = true;
1087 pattern = parse_pattern(optarg);
1088 if (pattern < 0) {
1089 return -EINVAL;
1091 break;
1092 case 'q':
1093 qflag = true;
1094 break;
1095 case 's':
1096 sflag = true;
1097 file_name = optarg;
1098 break;
1099 case 'u':
1100 flags |= BDRV_REQ_MAY_UNMAP;
1101 break;
1102 case 'z':
1103 zflag = true;
1104 break;
1105 default:
1106 qemuio_command_usage(&write_cmd);
1107 return -EINVAL;
1111 if (optind != argc - 2) {
1112 qemuio_command_usage(&write_cmd);
1113 return -EINVAL;
1116 if (bflag && zflag) {
1117 printf("-b and -z cannot be specified at the same time\n");
1118 return -EINVAL;
1121 if ((flags & BDRV_REQ_FUA) && (bflag || cflag)) {
1122 printf("-f and -b or -c cannot be specified at the same time\n");
1123 return -EINVAL;
1126 if ((flags & BDRV_REQ_NO_FALLBACK) && !zflag) {
1127 printf("-n requires -z to be specified\n");
1128 return -EINVAL;
1131 if ((flags & BDRV_REQ_MAY_UNMAP) && !zflag) {
1132 printf("-u requires -z to be specified\n");
1133 return -EINVAL;
1136 if (zflag + Pflag + sflag > 1) {
1137 printf("Only one of -z, -P, and -s "
1138 "can be specified at the same time\n");
1139 return -EINVAL;
1142 offset = cvtnum(argv[optind]);
1143 if (offset < 0) {
1144 print_cvtnum_err(offset, argv[optind]);
1145 return offset;
1148 optind++;
1149 count = cvtnum(argv[optind]);
1150 if (count < 0) {
1151 print_cvtnum_err(count, argv[optind]);
1152 return count;
1153 } else if (count > BDRV_REQUEST_MAX_BYTES) {
1154 printf("length cannot exceed %" PRIu64 ", given %s\n",
1155 (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]);
1156 return -EINVAL;
1159 if (bflag || cflag) {
1160 if (!QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE)) {
1161 printf("%" PRId64 " is not a sector-aligned value for 'offset'\n",
1162 offset);
1163 return -EINVAL;
1166 if (!QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE)) {
1167 printf("%"PRId64" is not a sector-aligned value for 'count'\n",
1168 count);
1169 return -EINVAL;
1173 if (!zflag) {
1174 if (sflag) {
1175 buf = qemu_io_alloc_from_file(blk, count, file_name);
1176 if (!buf) {
1177 return -EINVAL;
1179 } else {
1180 buf = qemu_io_alloc(blk, count, pattern);
1184 clock_gettime(CLOCK_MONOTONIC, &t1);
1185 if (bflag) {
1186 ret = do_save_vmstate(blk, buf, offset, count, &total);
1187 } else if (zflag) {
1188 ret = do_co_pwrite_zeroes(blk, offset, count, flags, &total);
1189 } else if (cflag) {
1190 ret = do_write_compressed(blk, buf, offset, count, &total);
1191 } else {
1192 ret = do_pwrite(blk, buf, offset, count, flags, &total);
1194 clock_gettime(CLOCK_MONOTONIC, &t2);
1196 if (ret < 0) {
1197 printf("write failed: %s\n", strerror(-ret));
1198 goto out;
1200 cnt = ret;
1202 ret = 0;
1204 if (qflag) {
1205 goto out;
1208 /* Finally, report back -- -C gives a parsable format */
1209 t2 = tsub(t2, t1);
1210 print_report("wrote", &t2, offset, count, total, cnt, Cflag);
1212 out:
1213 if (!zflag) {
1214 qemu_io_free(buf);
1216 return ret;
1219 static void
1220 writev_help(void)
1222 printf(
1223 "\n"
1224 " writes a range of bytes from the given offset source from multiple buffers\n"
1225 "\n"
1226 " Example:\n"
1227 " 'writev 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
1228 "\n"
1229 " Writes into a segment of the currently open file, using a buffer\n"
1230 " filled with a set pattern (0xcdcdcdcd).\n"
1231 " -P, -- use different pattern to fill file\n"
1232 " -C, -- report statistics in a machine parsable format\n"
1233 " -f, -- use Force Unit Access semantics\n"
1234 " -q, -- quiet mode, do not show I/O statistics\n"
1235 "\n");
1238 static int writev_f(BlockBackend *blk, int argc, char **argv);
1240 static const cmdinfo_t writev_cmd = {
1241 .name = "writev",
1242 .cfunc = writev_f,
1243 .perm = BLK_PERM_WRITE,
1244 .argmin = 2,
1245 .argmax = -1,
1246 .args = "[-Cfq] [-P pattern] off len [len..]",
1247 .oneline = "writes a number of bytes at a specified offset",
1248 .help = writev_help,
1251 static int writev_f(BlockBackend *blk, int argc, char **argv)
1253 struct timespec t1, t2;
1254 bool Cflag = false, qflag = false;
1255 int flags = 0;
1256 int c, cnt, ret;
1257 char *buf;
1258 int64_t offset;
1259 /* Some compilers get confused and warn if this is not initialized. */
1260 int total = 0;
1261 int nr_iov;
1262 int pattern = 0xcd;
1263 QEMUIOVector qiov;
1265 while ((c = getopt(argc, argv, "CfqP:")) != -1) {
1266 switch (c) {
1267 case 'C':
1268 Cflag = true;
1269 break;
1270 case 'f':
1271 flags |= BDRV_REQ_FUA;
1272 break;
1273 case 'q':
1274 qflag = true;
1275 break;
1276 case 'P':
1277 pattern = parse_pattern(optarg);
1278 if (pattern < 0) {
1279 return -EINVAL;
1281 break;
1282 default:
1283 qemuio_command_usage(&writev_cmd);
1284 return -EINVAL;
1288 if (optind > argc - 2) {
1289 qemuio_command_usage(&writev_cmd);
1290 return -EINVAL;
1293 offset = cvtnum(argv[optind]);
1294 if (offset < 0) {
1295 print_cvtnum_err(offset, argv[optind]);
1296 return offset;
1298 optind++;
1300 nr_iov = argc - optind;
1301 buf = create_iovec(blk, &qiov, &argv[optind], nr_iov, pattern);
1302 if (buf == NULL) {
1303 return -EINVAL;
1306 clock_gettime(CLOCK_MONOTONIC, &t1);
1307 ret = do_aio_writev(blk, &qiov, offset, flags, &total);
1308 clock_gettime(CLOCK_MONOTONIC, &t2);
1310 if (ret < 0) {
1311 printf("writev failed: %s\n", strerror(-ret));
1312 goto out;
1314 cnt = ret;
1316 ret = 0;
1318 if (qflag) {
1319 goto out;
1322 /* Finally, report back -- -C gives a parsable format */
1323 t2 = tsub(t2, t1);
1324 print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag);
1325 out:
1326 qemu_iovec_destroy(&qiov);
1327 qemu_io_free(buf);
1328 return ret;
1331 struct aio_ctx {
1332 BlockBackend *blk;
1333 QEMUIOVector qiov;
1334 int64_t offset;
1335 char *buf;
1336 bool qflag;
1337 bool vflag;
1338 bool Cflag;
1339 bool Pflag;
1340 bool zflag;
1341 BlockAcctCookie acct;
1342 int pattern;
1343 struct timespec t1;
1346 static void aio_write_done(void *opaque, int ret)
1348 struct aio_ctx *ctx = opaque;
1349 struct timespec t2;
1351 clock_gettime(CLOCK_MONOTONIC, &t2);
1354 if (ret < 0) {
1355 printf("aio_write failed: %s\n", strerror(-ret));
1356 block_acct_failed(blk_get_stats(ctx->blk), &ctx->acct);
1357 goto out;
1360 block_acct_done(blk_get_stats(ctx->blk), &ctx->acct);
1362 if (ctx->qflag) {
1363 goto out;
1366 /* Finally, report back -- -C gives a parsable format */
1367 t2 = tsub(t2, ctx->t1);
1368 print_report("wrote", &t2, ctx->offset, ctx->qiov.size,
1369 ctx->qiov.size, 1, ctx->Cflag);
1370 out:
1371 if (!ctx->zflag) {
1372 qemu_io_free(ctx->buf);
1373 qemu_iovec_destroy(&ctx->qiov);
1375 g_free(ctx);
1378 static void aio_read_done(void *opaque, int ret)
1380 struct aio_ctx *ctx = opaque;
1381 struct timespec t2;
1383 clock_gettime(CLOCK_MONOTONIC, &t2);
1385 if (ret < 0) {
1386 printf("readv failed: %s\n", strerror(-ret));
1387 block_acct_failed(blk_get_stats(ctx->blk), &ctx->acct);
1388 goto out;
1391 if (ctx->Pflag) {
1392 void *cmp_buf = g_malloc(ctx->qiov.size);
1394 memset(cmp_buf, ctx->pattern, ctx->qiov.size);
1395 if (memcmp(ctx->buf, cmp_buf, ctx->qiov.size)) {
1396 printf("Pattern verification failed at offset %"
1397 PRId64 ", %zu bytes\n", ctx->offset, ctx->qiov.size);
1399 g_free(cmp_buf);
1402 block_acct_done(blk_get_stats(ctx->blk), &ctx->acct);
1404 if (ctx->qflag) {
1405 goto out;
1408 if (ctx->vflag) {
1409 dump_buffer(ctx->buf, ctx->offset, ctx->qiov.size);
1412 /* Finally, report back -- -C gives a parsable format */
1413 t2 = tsub(t2, ctx->t1);
1414 print_report("read", &t2, ctx->offset, ctx->qiov.size,
1415 ctx->qiov.size, 1, ctx->Cflag);
1416 out:
1417 qemu_io_free(ctx->buf);
1418 qemu_iovec_destroy(&ctx->qiov);
1419 g_free(ctx);
1422 static void aio_read_help(void)
1424 printf(
1425 "\n"
1426 " asynchronously reads a range of bytes from the given offset\n"
1427 "\n"
1428 " Example:\n"
1429 " 'aio_read -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
1430 "\n"
1431 " Reads a segment of the currently open file, optionally dumping it to the\n"
1432 " standard output stream (with -v option) for subsequent inspection.\n"
1433 " The read is performed asynchronously and the aio_flush command must be\n"
1434 " used to ensure all outstanding aio requests have been completed.\n"
1435 " Note that due to its asynchronous nature, this command will be\n"
1436 " considered successful once the request is submitted, independently\n"
1437 " of potential I/O errors or pattern mismatches.\n"
1438 " -C, -- report statistics in a machine parsable format\n"
1439 " -P, -- use a pattern to verify read data\n"
1440 " -i, -- treat request as invalid, for exercising stats\n"
1441 " -v, -- dump buffer to standard output\n"
1442 " -q, -- quiet mode, do not show I/O statistics\n"
1443 "\n");
1446 static int aio_read_f(BlockBackend *blk, int argc, char **argv);
1448 static const cmdinfo_t aio_read_cmd = {
1449 .name = "aio_read",
1450 .cfunc = aio_read_f,
1451 .argmin = 2,
1452 .argmax = -1,
1453 .args = "[-Ciqv] [-P pattern] off len [len..]",
1454 .oneline = "asynchronously reads a number of bytes",
1455 .help = aio_read_help,
1458 static int aio_read_f(BlockBackend *blk, int argc, char **argv)
1460 int nr_iov, c;
1461 struct aio_ctx *ctx = g_new0(struct aio_ctx, 1);
1463 ctx->blk = blk;
1464 while ((c = getopt(argc, argv, "CP:iqv")) != -1) {
1465 switch (c) {
1466 case 'C':
1467 ctx->Cflag = true;
1468 break;
1469 case 'P':
1470 ctx->Pflag = true;
1471 ctx->pattern = parse_pattern(optarg);
1472 if (ctx->pattern < 0) {
1473 g_free(ctx);
1474 return -EINVAL;
1476 break;
1477 case 'i':
1478 printf("injecting invalid read request\n");
1479 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_READ);
1480 g_free(ctx);
1481 return 0;
1482 case 'q':
1483 ctx->qflag = true;
1484 break;
1485 case 'v':
1486 ctx->vflag = true;
1487 break;
1488 default:
1489 g_free(ctx);
1490 qemuio_command_usage(&aio_read_cmd);
1491 return -EINVAL;
1495 if (optind > argc - 2) {
1496 g_free(ctx);
1497 qemuio_command_usage(&aio_read_cmd);
1498 return -EINVAL;
1501 ctx->offset = cvtnum(argv[optind]);
1502 if (ctx->offset < 0) {
1503 int ret = ctx->offset;
1504 print_cvtnum_err(ret, argv[optind]);
1505 g_free(ctx);
1506 return ret;
1508 optind++;
1510 nr_iov = argc - optind;
1511 ctx->buf = create_iovec(blk, &ctx->qiov, &argv[optind], nr_iov, 0xab);
1512 if (ctx->buf == NULL) {
1513 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_READ);
1514 g_free(ctx);
1515 return -EINVAL;
1518 clock_gettime(CLOCK_MONOTONIC, &ctx->t1);
1519 block_acct_start(blk_get_stats(blk), &ctx->acct, ctx->qiov.size,
1520 BLOCK_ACCT_READ);
1521 blk_aio_preadv(blk, ctx->offset, &ctx->qiov, 0, aio_read_done, ctx);
1522 return 0;
1525 static void aio_write_help(void)
1527 printf(
1528 "\n"
1529 " asynchronously writes a range of bytes from the given offset source\n"
1530 " from multiple buffers\n"
1531 "\n"
1532 " Example:\n"
1533 " 'aio_write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
1534 "\n"
1535 " Writes into a segment of the currently open file, using a buffer\n"
1536 " filled with a set pattern (0xcdcdcdcd).\n"
1537 " The write is performed asynchronously and the aio_flush command must be\n"
1538 " used to ensure all outstanding aio requests have been completed.\n"
1539 " Note that due to its asynchronous nature, this command will be\n"
1540 " considered successful once the request is submitted, independently\n"
1541 " of potential I/O errors or pattern mismatches.\n"
1542 " -P, -- use different pattern to fill file\n"
1543 " -C, -- report statistics in a machine parsable format\n"
1544 " -f, -- use Force Unit Access semantics\n"
1545 " -i, -- treat request as invalid, for exercising stats\n"
1546 " -q, -- quiet mode, do not show I/O statistics\n"
1547 " -u, -- with -z, allow unmapping\n"
1548 " -z, -- write zeroes using blk_aio_pwrite_zeroes\n"
1549 "\n");
1552 static int aio_write_f(BlockBackend *blk, int argc, char **argv);
1554 static const cmdinfo_t aio_write_cmd = {
1555 .name = "aio_write",
1556 .cfunc = aio_write_f,
1557 .perm = BLK_PERM_WRITE,
1558 .argmin = 2,
1559 .argmax = -1,
1560 .args = "[-Cfiquz] [-P pattern] off len [len..]",
1561 .oneline = "asynchronously writes a number of bytes",
1562 .help = aio_write_help,
1565 static int aio_write_f(BlockBackend *blk, int argc, char **argv)
1567 int nr_iov, c;
1568 int pattern = 0xcd;
1569 struct aio_ctx *ctx = g_new0(struct aio_ctx, 1);
1570 int flags = 0;
1572 ctx->blk = blk;
1573 while ((c = getopt(argc, argv, "CfiqP:uz")) != -1) {
1574 switch (c) {
1575 case 'C':
1576 ctx->Cflag = true;
1577 break;
1578 case 'f':
1579 flags |= BDRV_REQ_FUA;
1580 break;
1581 case 'q':
1582 ctx->qflag = true;
1583 break;
1584 case 'u':
1585 flags |= BDRV_REQ_MAY_UNMAP;
1586 break;
1587 case 'P':
1588 pattern = parse_pattern(optarg);
1589 if (pattern < 0) {
1590 g_free(ctx);
1591 return -EINVAL;
1593 break;
1594 case 'i':
1595 printf("injecting invalid write request\n");
1596 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_WRITE);
1597 g_free(ctx);
1598 return 0;
1599 case 'z':
1600 ctx->zflag = true;
1601 break;
1602 default:
1603 g_free(ctx);
1604 qemuio_command_usage(&aio_write_cmd);
1605 return -EINVAL;
1609 if (optind > argc - 2) {
1610 g_free(ctx);
1611 qemuio_command_usage(&aio_write_cmd);
1612 return -EINVAL;
1615 if (ctx->zflag && optind != argc - 2) {
1616 printf("-z supports only a single length parameter\n");
1617 g_free(ctx);
1618 return -EINVAL;
1621 if ((flags & BDRV_REQ_MAY_UNMAP) && !ctx->zflag) {
1622 printf("-u requires -z to be specified\n");
1623 g_free(ctx);
1624 return -EINVAL;
1627 if (ctx->zflag && ctx->Pflag) {
1628 printf("-z and -P cannot be specified at the same time\n");
1629 g_free(ctx);
1630 return -EINVAL;
1633 ctx->offset = cvtnum(argv[optind]);
1634 if (ctx->offset < 0) {
1635 int ret = ctx->offset;
1636 print_cvtnum_err(ret, argv[optind]);
1637 g_free(ctx);
1638 return ret;
1640 optind++;
1642 if (ctx->zflag) {
1643 int64_t count = cvtnum(argv[optind]);
1644 if (count < 0) {
1645 print_cvtnum_err(count, argv[optind]);
1646 g_free(ctx);
1647 return count;
1650 ctx->qiov.size = count;
1651 blk_aio_pwrite_zeroes(blk, ctx->offset, count, flags, aio_write_done,
1652 ctx);
1653 } else {
1654 nr_iov = argc - optind;
1655 ctx->buf = create_iovec(blk, &ctx->qiov, &argv[optind], nr_iov,
1656 pattern);
1657 if (ctx->buf == NULL) {
1658 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_WRITE);
1659 g_free(ctx);
1660 return -EINVAL;
1663 clock_gettime(CLOCK_MONOTONIC, &ctx->t1);
1664 block_acct_start(blk_get_stats(blk), &ctx->acct, ctx->qiov.size,
1665 BLOCK_ACCT_WRITE);
1667 blk_aio_pwritev(blk, ctx->offset, &ctx->qiov, flags, aio_write_done,
1668 ctx);
1671 return 0;
1674 static int aio_flush_f(BlockBackend *blk, int argc, char **argv)
1676 BlockAcctCookie cookie;
1677 block_acct_start(blk_get_stats(blk), &cookie, 0, BLOCK_ACCT_FLUSH);
1678 blk_drain_all();
1679 block_acct_done(blk_get_stats(blk), &cookie);
1680 return 0;
1683 static const cmdinfo_t aio_flush_cmd = {
1684 .name = "aio_flush",
1685 .cfunc = aio_flush_f,
1686 .oneline = "completes all outstanding aio requests"
1689 static int flush_f(BlockBackend *blk, int argc, char **argv)
1691 return blk_flush(blk);
1694 static const cmdinfo_t flush_cmd = {
1695 .name = "flush",
1696 .altname = "f",
1697 .cfunc = flush_f,
1698 .oneline = "flush all in-core file state to disk",
1701 static int truncate_f(BlockBackend *blk, int argc, char **argv);
1702 static const cmdinfo_t truncate_cmd = {
1703 .name = "truncate",
1704 .altname = "t",
1705 .cfunc = truncate_f,
1706 .perm = BLK_PERM_WRITE | BLK_PERM_RESIZE,
1707 .argmin = 1,
1708 .argmax = 3,
1709 .args = "[-m prealloc_mode] off",
1710 .oneline = "truncates the current file at the given offset",
1713 static int truncate_f(BlockBackend *blk, int argc, char **argv)
1715 Error *local_err = NULL;
1716 int64_t offset;
1717 int c, ret;
1718 PreallocMode prealloc = PREALLOC_MODE_OFF;
1720 while ((c = getopt(argc, argv, "m:")) != -1) {
1721 switch (c) {
1722 case 'm':
1723 prealloc = qapi_enum_parse(&PreallocMode_lookup, optarg,
1724 PREALLOC_MODE__MAX, NULL);
1725 if (prealloc == PREALLOC_MODE__MAX) {
1726 error_report("Invalid preallocation mode '%s'", optarg);
1727 return -EINVAL;
1729 break;
1730 default:
1731 qemuio_command_usage(&truncate_cmd);
1732 return -EINVAL;
1736 offset = cvtnum(argv[optind]);
1737 if (offset < 0) {
1738 print_cvtnum_err(offset, argv[1]);
1739 return offset;
1743 * qemu-io is a debugging tool, so let us be strict here and pass
1744 * exact=true. It is better to err on the "emit more errors" side
1745 * than to be overly permissive.
1747 ret = blk_truncate(blk, offset, false, prealloc, 0, &local_err);
1748 if (ret < 0) {
1749 error_report_err(local_err);
1750 return ret;
1753 return 0;
1756 static int length_f(BlockBackend *blk, int argc, char **argv)
1758 int64_t size;
1759 char s1[64];
1761 size = blk_getlength(blk);
1762 if (size < 0) {
1763 printf("getlength: %s\n", strerror(-size));
1764 return size;
1767 cvtstr(size, s1, sizeof(s1));
1768 printf("%s\n", s1);
1769 return 0;
1773 static const cmdinfo_t length_cmd = {
1774 .name = "length",
1775 .altname = "l",
1776 .cfunc = length_f,
1777 .oneline = "gets the length of the current file",
1781 static int info_f(BlockBackend *blk, int argc, char **argv)
1783 BlockDriverState *bs = blk_bs(blk);
1784 BlockDriverInfo bdi;
1785 ImageInfoSpecific *spec_info;
1786 Error *local_err = NULL;
1787 char s1[64], s2[64];
1788 int ret;
1790 if (bs->drv && bs->drv->format_name) {
1791 printf("format name: %s\n", bs->drv->format_name);
1793 if (bs->drv && bs->drv->protocol_name) {
1794 printf("format name: %s\n", bs->drv->protocol_name);
1797 ret = bdrv_get_info(bs, &bdi);
1798 if (ret) {
1799 return ret;
1802 cvtstr(bdi.cluster_size, s1, sizeof(s1));
1803 cvtstr(bdi.vm_state_offset, s2, sizeof(s2));
1805 printf("cluster size: %s\n", s1);
1806 printf("vm state offset: %s\n", s2);
1808 spec_info = bdrv_get_specific_info(bs, &local_err);
1809 if (local_err) {
1810 error_report_err(local_err);
1811 return -EIO;
1813 if (spec_info) {
1814 printf("Format specific information:\n");
1815 bdrv_image_info_specific_dump(spec_info);
1816 qapi_free_ImageInfoSpecific(spec_info);
1819 return 0;
1824 static const cmdinfo_t info_cmd = {
1825 .name = "info",
1826 .altname = "i",
1827 .cfunc = info_f,
1828 .oneline = "prints information about the current file",
1831 static void discard_help(void)
1833 printf(
1834 "\n"
1835 " discards a range of bytes from the given offset\n"
1836 "\n"
1837 " Example:\n"
1838 " 'discard 512 1k' - discards 1 kilobyte from 512 bytes into the file\n"
1839 "\n"
1840 " Discards a segment of the currently open file.\n"
1841 " -C, -- report statistics in a machine parsable format\n"
1842 " -q, -- quiet mode, do not show I/O statistics\n"
1843 "\n");
1846 static int discard_f(BlockBackend *blk, int argc, char **argv);
1848 static const cmdinfo_t discard_cmd = {
1849 .name = "discard",
1850 .altname = "d",
1851 .cfunc = discard_f,
1852 .perm = BLK_PERM_WRITE,
1853 .argmin = 2,
1854 .argmax = -1,
1855 .args = "[-Cq] off len",
1856 .oneline = "discards a number of bytes at a specified offset",
1857 .help = discard_help,
1860 static int discard_f(BlockBackend *blk, int argc, char **argv)
1862 struct timespec t1, t2;
1863 bool Cflag = false, qflag = false;
1864 int c, ret;
1865 int64_t offset, bytes;
1867 while ((c = getopt(argc, argv, "Cq")) != -1) {
1868 switch (c) {
1869 case 'C':
1870 Cflag = true;
1871 break;
1872 case 'q':
1873 qflag = true;
1874 break;
1875 default:
1876 qemuio_command_usage(&discard_cmd);
1877 return -EINVAL;
1881 if (optind != argc - 2) {
1882 qemuio_command_usage(&discard_cmd);
1883 return -EINVAL;
1886 offset = cvtnum(argv[optind]);
1887 if (offset < 0) {
1888 print_cvtnum_err(offset, argv[optind]);
1889 return offset;
1892 optind++;
1893 bytes = cvtnum(argv[optind]);
1894 if (bytes < 0) {
1895 print_cvtnum_err(bytes, argv[optind]);
1896 return bytes;
1897 } else if (bytes > BDRV_REQUEST_MAX_BYTES) {
1898 printf("length cannot exceed %"PRIu64", given %s\n",
1899 (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]);
1900 return -EINVAL;
1903 clock_gettime(CLOCK_MONOTONIC, &t1);
1904 ret = blk_pdiscard(blk, offset, bytes);
1905 clock_gettime(CLOCK_MONOTONIC, &t2);
1907 if (ret < 0) {
1908 printf("discard failed: %s\n", strerror(-ret));
1909 return ret;
1912 /* Finally, report back -- -C gives a parsable format */
1913 if (!qflag) {
1914 t2 = tsub(t2, t1);
1915 print_report("discard", &t2, offset, bytes, bytes, 1, Cflag);
1918 return 0;
1921 static int alloc_f(BlockBackend *blk, int argc, char **argv)
1923 BlockDriverState *bs = blk_bs(blk);
1924 int64_t offset, start, remaining, count;
1925 char s1[64];
1926 int ret;
1927 int64_t num, sum_alloc;
1929 start = offset = cvtnum(argv[1]);
1930 if (offset < 0) {
1931 print_cvtnum_err(offset, argv[1]);
1932 return offset;
1935 if (argc == 3) {
1936 count = cvtnum(argv[2]);
1937 if (count < 0) {
1938 print_cvtnum_err(count, argv[2]);
1939 return count;
1941 } else {
1942 count = BDRV_SECTOR_SIZE;
1945 remaining = count;
1946 sum_alloc = 0;
1947 while (remaining) {
1948 ret = bdrv_is_allocated(bs, offset, remaining, &num);
1949 if (ret < 0) {
1950 printf("is_allocated failed: %s\n", strerror(-ret));
1951 return ret;
1953 offset += num;
1954 remaining -= num;
1955 if (ret) {
1956 sum_alloc += num;
1958 if (num == 0) {
1959 count -= remaining;
1960 remaining = 0;
1964 cvtstr(start, s1, sizeof(s1));
1966 printf("%"PRId64"/%"PRId64" bytes allocated at offset %s\n",
1967 sum_alloc, count, s1);
1968 return 0;
1971 static const cmdinfo_t alloc_cmd = {
1972 .name = "alloc",
1973 .altname = "a",
1974 .argmin = 1,
1975 .argmax = 2,
1976 .cfunc = alloc_f,
1977 .args = "offset [count]",
1978 .oneline = "checks if offset is allocated in the file",
1982 static int map_is_allocated(BlockDriverState *bs, int64_t offset,
1983 int64_t bytes, int64_t *pnum)
1985 int64_t num;
1986 int num_checked;
1987 int ret, firstret;
1989 num_checked = MIN(bytes, BDRV_REQUEST_MAX_BYTES);
1990 ret = bdrv_is_allocated(bs, offset, num_checked, &num);
1991 if (ret < 0) {
1992 return ret;
1995 firstret = ret;
1996 *pnum = num;
1998 while (bytes > 0 && ret == firstret) {
1999 offset += num;
2000 bytes -= num;
2002 num_checked = MIN(bytes, BDRV_REQUEST_MAX_BYTES);
2003 ret = bdrv_is_allocated(bs, offset, num_checked, &num);
2004 if (ret == firstret && num) {
2005 *pnum += num;
2006 } else {
2007 break;
2011 return firstret;
2014 static int map_f(BlockBackend *blk, int argc, char **argv)
2016 int64_t offset, bytes;
2017 char s1[64], s2[64];
2018 int64_t num;
2019 int ret;
2020 const char *retstr;
2022 offset = 0;
2023 bytes = blk_getlength(blk);
2024 if (bytes < 0) {
2025 error_report("Failed to query image length: %s", strerror(-bytes));
2026 return bytes;
2029 while (bytes) {
2030 ret = map_is_allocated(blk_bs(blk), offset, bytes, &num);
2031 if (ret < 0) {
2032 error_report("Failed to get allocation status: %s", strerror(-ret));
2033 return ret;
2034 } else if (!num) {
2035 error_report("Unexpected end of image");
2036 return -EIO;
2039 retstr = ret ? " allocated" : "not allocated";
2040 cvtstr(num, s1, sizeof(s1));
2041 cvtstr(offset, s2, sizeof(s2));
2042 printf("%s (0x%" PRIx64 ") bytes %s at offset %s (0x%" PRIx64 ")\n",
2043 s1, num, retstr, s2, offset);
2045 offset += num;
2046 bytes -= num;
2049 return 0;
2052 static const cmdinfo_t map_cmd = {
2053 .name = "map",
2054 .argmin = 0,
2055 .argmax = 0,
2056 .cfunc = map_f,
2057 .args = "",
2058 .oneline = "prints the allocated areas of a file",
2061 static void reopen_help(void)
2063 printf(
2064 "\n"
2065 " Changes the open options of an already opened image\n"
2066 "\n"
2067 " Example:\n"
2068 " 'reopen -o lazy-refcounts=on' - activates lazy refcount writeback on a qcow2 image\n"
2069 "\n"
2070 " -r, -- Reopen the image read-only\n"
2071 " -w, -- Reopen the image read-write\n"
2072 " -c, -- Change the cache mode to the given value\n"
2073 " -o, -- Changes block driver options (cf. 'open' command)\n"
2074 "\n");
2077 static int reopen_f(BlockBackend *blk, int argc, char **argv);
2079 static QemuOptsList reopen_opts = {
2080 .name = "reopen",
2081 .merge_lists = true,
2082 .head = QTAILQ_HEAD_INITIALIZER(reopen_opts.head),
2083 .desc = {
2084 /* no elements => accept any params */
2085 { /* end of list */ }
2089 static const cmdinfo_t reopen_cmd = {
2090 .name = "reopen",
2091 .argmin = 0,
2092 .argmax = -1,
2093 .cfunc = reopen_f,
2094 .args = "[(-r|-w)] [-c cache] [-o options]",
2095 .oneline = "reopens an image with new options",
2096 .help = reopen_help,
2099 static int reopen_f(BlockBackend *blk, int argc, char **argv)
2101 BlockDriverState *bs = blk_bs(blk);
2102 QemuOpts *qopts;
2103 QDict *opts;
2104 int c;
2105 int flags = bs->open_flags;
2106 bool writethrough = !blk_enable_write_cache(blk);
2107 bool has_rw_option = false;
2108 bool has_cache_option = false;
2110 BlockReopenQueue *brq;
2111 Error *local_err = NULL;
2113 while ((c = getopt(argc, argv, "c:o:rw")) != -1) {
2114 switch (c) {
2115 case 'c':
2116 if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) < 0) {
2117 error_report("Invalid cache option: %s", optarg);
2118 return -EINVAL;
2120 has_cache_option = true;
2121 break;
2122 case 'o':
2123 if (!qemu_opts_parse_noisily(&reopen_opts, optarg, 0)) {
2124 qemu_opts_reset(&reopen_opts);
2125 return -EINVAL;
2127 break;
2128 case 'r':
2129 if (has_rw_option) {
2130 error_report("Only one -r/-w option may be given");
2131 return -EINVAL;
2133 flags &= ~BDRV_O_RDWR;
2134 has_rw_option = true;
2135 break;
2136 case 'w':
2137 if (has_rw_option) {
2138 error_report("Only one -r/-w option may be given");
2139 return -EINVAL;
2141 flags |= BDRV_O_RDWR;
2142 has_rw_option = true;
2143 break;
2144 default:
2145 qemu_opts_reset(&reopen_opts);
2146 qemuio_command_usage(&reopen_cmd);
2147 return -EINVAL;
2151 if (optind != argc) {
2152 qemu_opts_reset(&reopen_opts);
2153 qemuio_command_usage(&reopen_cmd);
2154 return -EINVAL;
2157 if (!writethrough != blk_enable_write_cache(blk) &&
2158 blk_get_attached_dev(blk))
2160 error_report("Cannot change cache.writeback: Device attached");
2161 qemu_opts_reset(&reopen_opts);
2162 return -EBUSY;
2165 if (!(flags & BDRV_O_RDWR)) {
2166 uint64_t orig_perm, orig_shared_perm;
2168 bdrv_drain(bs);
2170 blk_get_perm(blk, &orig_perm, &orig_shared_perm);
2171 blk_set_perm(blk,
2172 orig_perm & ~(BLK_PERM_WRITE | BLK_PERM_WRITE_UNCHANGED),
2173 orig_shared_perm,
2174 &error_abort);
2177 qopts = qemu_opts_find(&reopen_opts, NULL);
2178 opts = qopts ? qemu_opts_to_qdict(qopts, NULL) : qdict_new();
2179 qemu_opts_reset(&reopen_opts);
2181 if (qdict_haskey(opts, BDRV_OPT_READ_ONLY)) {
2182 if (has_rw_option) {
2183 error_report("Cannot set both -r/-w and '" BDRV_OPT_READ_ONLY "'");
2184 qobject_unref(opts);
2185 return -EINVAL;
2187 } else {
2188 qdict_put_bool(opts, BDRV_OPT_READ_ONLY, !(flags & BDRV_O_RDWR));
2191 if (qdict_haskey(opts, BDRV_OPT_CACHE_DIRECT) ||
2192 qdict_haskey(opts, BDRV_OPT_CACHE_NO_FLUSH)) {
2193 if (has_cache_option) {
2194 error_report("Cannot set both -c and the cache options");
2195 qobject_unref(opts);
2196 return -EINVAL;
2198 } else {
2199 qdict_put_bool(opts, BDRV_OPT_CACHE_DIRECT, flags & BDRV_O_NOCACHE);
2200 qdict_put_bool(opts, BDRV_OPT_CACHE_NO_FLUSH, flags & BDRV_O_NO_FLUSH);
2203 bdrv_subtree_drained_begin(bs);
2204 brq = bdrv_reopen_queue(NULL, bs, opts, true);
2205 bdrv_reopen_multiple(brq, &local_err);
2206 bdrv_subtree_drained_end(bs);
2208 if (local_err) {
2209 error_report_err(local_err);
2210 return -EINVAL;
2213 blk_set_enable_write_cache(blk, !writethrough);
2214 return 0;
2217 static int break_f(BlockBackend *blk, int argc, char **argv)
2219 int ret;
2221 ret = bdrv_debug_breakpoint(blk_bs(blk), argv[1], argv[2]);
2222 if (ret < 0) {
2223 printf("Could not set breakpoint: %s\n", strerror(-ret));
2224 return ret;
2227 return 0;
2230 static int remove_break_f(BlockBackend *blk, int argc, char **argv)
2232 int ret;
2234 ret = bdrv_debug_remove_breakpoint(blk_bs(blk), argv[1]);
2235 if (ret < 0) {
2236 printf("Could not remove breakpoint %s: %s\n", argv[1], strerror(-ret));
2237 return ret;
2240 return 0;
2243 static const cmdinfo_t break_cmd = {
2244 .name = "break",
2245 .argmin = 2,
2246 .argmax = 2,
2247 .cfunc = break_f,
2248 .args = "event tag",
2249 .oneline = "sets a breakpoint on event and tags the stopped "
2250 "request as tag",
2253 static const cmdinfo_t remove_break_cmd = {
2254 .name = "remove_break",
2255 .argmin = 1,
2256 .argmax = 1,
2257 .cfunc = remove_break_f,
2258 .args = "tag",
2259 .oneline = "remove a breakpoint by tag",
2262 static int resume_f(BlockBackend *blk, int argc, char **argv)
2264 int ret;
2266 ret = bdrv_debug_resume(blk_bs(blk), argv[1]);
2267 if (ret < 0) {
2268 printf("Could not resume request: %s\n", strerror(-ret));
2269 return ret;
2272 return 0;
2275 static const cmdinfo_t resume_cmd = {
2276 .name = "resume",
2277 .argmin = 1,
2278 .argmax = 1,
2279 .cfunc = resume_f,
2280 .args = "tag",
2281 .oneline = "resumes the request tagged as tag",
2284 static int wait_break_f(BlockBackend *blk, int argc, char **argv)
2286 while (!bdrv_debug_is_suspended(blk_bs(blk), argv[1])) {
2287 aio_poll(blk_get_aio_context(blk), true);
2289 return 0;
2292 static const cmdinfo_t wait_break_cmd = {
2293 .name = "wait_break",
2294 .argmin = 1,
2295 .argmax = 1,
2296 .cfunc = wait_break_f,
2297 .args = "tag",
2298 .oneline = "waits for the suspension of a request",
2301 static int abort_f(BlockBackend *blk, int argc, char **argv)
2303 abort();
2306 static const cmdinfo_t abort_cmd = {
2307 .name = "abort",
2308 .cfunc = abort_f,
2309 .flags = CMD_NOFILE_OK,
2310 .oneline = "simulate a program crash using abort(3)",
2313 static void sigraise_help(void)
2315 printf(
2316 "\n"
2317 " raises the given signal\n"
2318 "\n"
2319 " Example:\n"
2320 " 'sigraise %i' - raises SIGTERM\n"
2321 "\n"
2322 " Invokes raise(signal), where \"signal\" is the mandatory integer argument\n"
2323 " given to sigraise.\n"
2324 "\n", SIGTERM);
2327 static int sigraise_f(BlockBackend *blk, int argc, char **argv);
2329 static const cmdinfo_t sigraise_cmd = {
2330 .name = "sigraise",
2331 .cfunc = sigraise_f,
2332 .argmin = 1,
2333 .argmax = 1,
2334 .flags = CMD_NOFILE_OK,
2335 .args = "signal",
2336 .oneline = "raises a signal",
2337 .help = sigraise_help,
2340 static int sigraise_f(BlockBackend *blk, int argc, char **argv)
2342 int64_t sig = cvtnum(argv[1]);
2343 if (sig < 0) {
2344 print_cvtnum_err(sig, argv[1]);
2345 return sig;
2346 } else if (sig > NSIG) {
2347 printf("signal argument '%s' is too large to be a valid signal\n",
2348 argv[1]);
2349 return -EINVAL;
2352 /* Using raise() to kill this process does not necessarily flush all open
2353 * streams. At least stdout and stderr (although the latter should be
2354 * non-buffered anyway) should be flushed, though. */
2355 fflush(stdout);
2356 fflush(stderr);
2358 raise(sig);
2360 return 0;
2363 static void sleep_cb(void *opaque)
2365 bool *expired = opaque;
2366 *expired = true;
2369 static int sleep_f(BlockBackend *blk, int argc, char **argv)
2371 char *endptr;
2372 long ms;
2373 struct QEMUTimer *timer;
2374 bool expired = false;
2376 ms = strtol(argv[1], &endptr, 0);
2377 if (ms < 0 || *endptr != '\0') {
2378 printf("%s is not a valid number\n", argv[1]);
2379 return -EINVAL;
2382 timer = timer_new_ns(QEMU_CLOCK_HOST, sleep_cb, &expired);
2383 timer_mod(timer, qemu_clock_get_ns(QEMU_CLOCK_HOST) + SCALE_MS * ms);
2385 while (!expired) {
2386 main_loop_wait(false);
2389 timer_free(timer);
2390 return 0;
2393 static const cmdinfo_t sleep_cmd = {
2394 .name = "sleep",
2395 .argmin = 1,
2396 .argmax = 1,
2397 .cfunc = sleep_f,
2398 .flags = CMD_NOFILE_OK,
2399 .oneline = "waits for the given value in milliseconds",
2402 static void help_oneline(const char *cmd, const cmdinfo_t *ct)
2404 printf("%s ", cmd);
2406 if (ct->args) {
2407 printf("%s ", ct->args);
2409 printf("-- %s\n", ct->oneline);
2412 static void help_onecmd(const char *cmd, const cmdinfo_t *ct)
2414 help_oneline(cmd, ct);
2415 if (ct->help) {
2416 ct->help();
2420 static void help_all(void)
2422 const cmdinfo_t *ct;
2424 for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
2425 help_oneline(ct->name, ct);
2427 printf("\nUse 'help commandname' for extended help.\n");
2430 static int help_f(BlockBackend *blk, int argc, char **argv)
2432 const cmdinfo_t *ct;
2434 if (argc < 2) {
2435 help_all();
2436 return 0;
2439 ct = find_command(argv[1]);
2440 if (ct == NULL) {
2441 printf("command %s not found\n", argv[1]);
2442 return -EINVAL;
2445 help_onecmd(argv[1], ct);
2446 return 0;
2449 static const cmdinfo_t help_cmd = {
2450 .name = "help",
2451 .altname = "?",
2452 .cfunc = help_f,
2453 .argmin = 0,
2454 .argmax = 1,
2455 .flags = CMD_FLAG_GLOBAL,
2456 .args = "[command]",
2457 .oneline = "help for one or all commands",
2460 int qemuio_command(BlockBackend *blk, const char *cmd)
2462 AioContext *ctx;
2463 char *input;
2464 const cmdinfo_t *ct;
2465 char **v;
2466 int c;
2467 int ret = 0;
2469 input = g_strdup(cmd);
2470 v = breakline(input, &c);
2471 if (c) {
2472 ct = find_command(v[0]);
2473 if (ct) {
2474 ctx = blk ? blk_get_aio_context(blk) : qemu_get_aio_context();
2475 aio_context_acquire(ctx);
2476 ret = command(blk, ct, c, v);
2477 aio_context_release(ctx);
2478 } else {
2479 fprintf(stderr, "command \"%s\" not found\n", v[0]);
2480 ret = -EINVAL;
2483 g_free(input);
2484 g_free(v);
2486 return ret;
2489 static void __attribute((constructor)) init_qemuio_commands(void)
2491 /* initialize commands */
2492 qemuio_add_command(&help_cmd);
2493 qemuio_add_command(&read_cmd);
2494 qemuio_add_command(&readv_cmd);
2495 qemuio_add_command(&write_cmd);
2496 qemuio_add_command(&writev_cmd);
2497 qemuio_add_command(&aio_read_cmd);
2498 qemuio_add_command(&aio_write_cmd);
2499 qemuio_add_command(&aio_flush_cmd);
2500 qemuio_add_command(&flush_cmd);
2501 qemuio_add_command(&truncate_cmd);
2502 qemuio_add_command(&length_cmd);
2503 qemuio_add_command(&info_cmd);
2504 qemuio_add_command(&discard_cmd);
2505 qemuio_add_command(&alloc_cmd);
2506 qemuio_add_command(&map_cmd);
2507 qemuio_add_command(&reopen_cmd);
2508 qemuio_add_command(&break_cmd);
2509 qemuio_add_command(&remove_break_cmd);
2510 qemuio_add_command(&resume_cmd);
2511 qemuio_add_command(&wait_break_cmd);
2512 qemuio_add_command(&abort_cmd);
2513 qemuio_add_command(&sleep_cmd);
2514 qemuio_add_command(&sigraise_cmd);